How is the buildings exterior maintained?
All buildings get dirty from airborne pollutants, but The Transamerica Pyramid is prone to collecting dirt due to its shape. The Pyramids 3,678 windows are washed and polished several times per year, and the buildings white quartz exterior undergoes a brightening about every 10 years, involving about 18,000 work hours. This involves replacing more than 50 miles of caulking, applying a chemical wash and then a power wash, and finally a penetrating masonry sealer. This two-year process was most recently completed in 2007.
